Foxconn has since performed an internal investigation, and has determined that assigning night shifts and overtime to students was in violation of the company's policies.

“Immediate actions have been taken to bring that campus into full compliance with our code and policies,” Foxconn said in a statement to Quartz, including “reinforcing the policies of no overtime and no night shifts for student interns, even though such work is voluntary, and reminding all interns of their rights to terminate their participation in the program at any time.”

But this isn't the first time Foxconn has been accused of some shady business practices.